package com.zy.reggie.controller;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.zy.reggie.common.R;
import com.zy.reggie.dto.DishDto;
import com.zy.reggie.entity.Category;
import com.zy.reggie.entity.Dish;
import com.zy.reggie.entity.DishFlavor;
import com.zy.reggie.service.CategoryService;
import com.zy.reggie.service.DishFlavorService;
import com.zy.reggie.service.DishService;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.List;
import java.util.stream.Collectors;

@Slf4j
@RestController
@RequestMapping("/dish")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private DishFlavorService dishFlavorService;
    @Autowired
    private CategoryService categoryService;
    @PostMapping
    public R<String> save(@RequestBody DishDto dishDto) {
        log.info("dishDto是：{}",dishDto.toString());
        dishService.saveWithFlavor(dishDto);
        return R.success("新增菜品成功");
    }
    @GetMapping("/page")
    public R<Page> page(int page,int pageSize,String name) {
        //分页构造器对象
        Page<Dish> pageInfo = new Page<Dish>(page,pageSize);
        //此时的dishDtoPage没有数据，因为数据库查询菜品信息时，获取到的分页查询结果 Page 的泛型为 Dish
        Page<DishDto> dishDtoPage = new Page<>();
        //创建查询构造器
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        //添加查询过滤条件
        lambdaQueryWrapper.like(name != null,Dish::getName,name);
        //添加排序条件
        lambdaQueryWrapper.orderByDesc(Dish::getUpdateTime);
        //执行分页查询
        dishService.page(pageInfo,lambdaQueryWrapper);//此时categoryName不会显示在前端页面上，因为只有categoryId
        //所以不能单单使用dish这个对象，因为他不包含categoryName，所以使用dishDto
        //由于dishDtoPage没有数据，要把pageInfo中的数据赋值给它
        //赋值时忽略records这个集合，是要对此进行处理，此时records的泛型是dish,我们要使其变成dishDto
        BeanUtils.copyProperties(pageInfo,dishDtoPage,"records");
        List<Dish> records = pageInfo.getRecords();
        List<DishDto> list = records.stream().map((item) ->{
            //将记录赋值给dishDto
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);
            Long categoryId = item.getCategoryId();//获取分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if (category!=null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }
            return dishDto;

        }).collect(Collectors.toList());
        dishDtoPage.setRecords(list);
        return R.success(dishDtoPage);

    }

    /**
     * 根据id查询对应的菜品信息及口味信息；
     * @param id
     * @return
     */
    @GetMapping("/{id}")
    public R<DishDto> get(@PathVariable Long id) {
        DishDto dishDto = dishService.getByIdWithFlavor(id);
        return R.success(dishDto);
    }
    @PutMapping
    public R<String> update(@RequestBody DishDto dishDto) {
        log.info("dishDto是：{}",dishDto.toString());
        dishService.updateWithFlavor(dishDto);
        return R.success("修改菜品成功");
    }

    /**
     * 根据条件查询对应菜品信息
     * @param dish
     * @return
     */
    @GetMapping("list")
    //使用形参dish来接受数据，功能更全面
    public R<List<DishDto>> list(Dish dish) {
        //构造条件查询器
        LambdaQueryWrapper<Dish> lambdaQueryWrapper = new LambdaQueryWrapper<>();
        lambdaQueryWrapper.eq(dish.getCategoryId()!=null,Dish::getCategoryId,dish.getCategoryId());
        //添加条件，查询状态为1（起售状态）的菜品
        lambdaQueryWrapper.eq(Dish::getStatus,1);
        //排序
        lambdaQueryWrapper.orderByAsc(Dish::getSort).orderByDesc(Dish::getUpdateTime);
        List<Dish> list = dishService.list(lambdaQueryWrapper);
        List<DishDto> dishDtoList = list.stream().map((item) -> {
            DishDto dishDto = new DishDto();
            BeanUtils.copyProperties(item,dishDto);

            Long categoryId = item.getCategoryId();//分类id
            //根据id查询分类对象
            Category category = categoryService.getById(categoryId);
            if(category != null){
                String categoryName = category.getName();
                dishDto.setCategoryName(categoryName);
            }

            //当前菜品的id
            Long dishId = item.getId();
            LambdaQueryWrapper<DishFlavor> lambdaQueryWrappers = new LambdaQueryWrapper<>();
            lambdaQueryWrappers.eq(DishFlavor::getDishId,dishId);
            //SQL:select * from dish_flavor where dish_id = ?
            List<DishFlavor> dishFlavorList = dishFlavorService.list(lambdaQueryWrappers);
            dishDto.setFlavors(dishFlavorList);

            return dishDto;
        }).collect(Collectors.toList());

        return R.success(dishDtoList);
    }

    /**
     * 对菜品批量或者是单个 进行停售或者是起售
     * @return
     */
    //这个参数这里一定记得加注解才能获取到参数，否则这里非常容易出问题
    @PostMapping("/status/{status}")
    public R<String> status(@PathVariable("status") Integer status,@RequestParam List<Long> ids){
        //log.info("status:{}",status);
        //log.info("ids:{}",ids);
        LambdaQueryWrapper<Dish> queryWrapper = new LambdaQueryWrapper();
        queryWrapper.in(ids !=null,Dish::getId,ids);
        //根据数据进行批量查询
        List<Dish> list = dishService.list(queryWrapper);

        for (Dish dish : list) {
            if (dish != null){
                dish.setStatus(status);
                dishService.updateById(dish);
            }
        }
        return R.success("售卖状态修改成功");
    }

    /**
     * 套餐批量删除和单个删除,删除的菜品的状态必须是已停售
     * @return
     */
    @DeleteMapping
    public R<String> delete(@RequestParam("ids") List<Long> ids){
        //删除菜品  这里的删除是逻辑删除
        dishService.deleteByIds(ids);
        //删除菜品对应的口味  也是逻辑删除
        LambdaQueryWrapper<DishFlavor> queryWrapper = new LambdaQueryWrapper<>();
        queryWrapper.in(DishFlavor::getDishId,ids);
        dishFlavorService.remove(queryWrapper);
        return R.success("菜品删除成功");
    }
}

